With a 6 in shaft, the Klein Tools 5/16 in keystone tip screwdriver features quality tempered steel, carefully heat-treated for ideal durability. An insulated, cushion-grip handle and integral flanges on the inside provide a solid, twist-resistant blade anchor that allows for optimal torque and comfort while offering protection against electric shock. Built to handle the tough jobs with ease Hex bolster reinforces shank for hard use and allows wrench assisted turning Cushion grip handle for greater torque and comfort Premium chrome-plated for smooth feel and corrosion-resistance Internal flanges inside handle provide solid, twist-resistant blade anchor